Oil Level Sensor: Service and Repair

12 61 285 Remove and install or replace the oil level sensor for engine oil (N52, N52K, N51, N46, N54, N54T, N53)







IMPORTANT: Read and comply with notes on protection against electrostatic discharge (ESD protection).







Necessary preliminary tasks:
- Switch off ignition.
- only E60, E61, E63, E64, E83, E85, E86, E70, E71:
Remove reinforcement plate.
- only E70, E81, E87, E82, E88, E90, E91, E92, E93:
Remove underbody protection
- Drain engine oil.







Unlock connector (1) and remove.
Unscrew nuts.
Tightening torque 12 61 2AZ.
Remove oil level sensor (2).

Installation note:
Clean sealing surface on oil sump.
Replace seal on oil level sensor.
An excessively low torque value will result in oil leaks.
An excessively high torque value will result in damage to the oil level sensor.
Top up engine oil.







Only if the holder for earth strap is installed.
Absolutely reinstall the holder (1) with the earth strap (2).
Tighten earth strap (2) with screws (3) between the holder and cable clip on the gearbox.
Tightening torque 12 52 1AZ.
If the holder with earth strap is not reinstalled, it can lead to an operating failure of the oil level sensor.







Installation note:
Top up engine oil.
Screw on oil filter cover tightly.